Sights and methods of operation thereof

Abstract

A sight and methods of operation thereof are provided. In some embodiments, an image is captured via an image capture unit, and a center position is calculated according to the positions of at least three impact points in the image, and a predefined view center of a display unit is set to the center position. In some embodiments, an angle of dip of the sight to a plane is detected via a dip angle detector. A predictive impact point is calculated according to the angle of dip and at least one calculation parameter, and an impact point indication is accordingly displayed in the display unit. When the angle of dip is changed, the predictive impact point is recalculated according to the new angle of dip, and the corresponding impact point indication is displayed.

What is claimed is: 
     
       1. A sight, comprising:
 a display unit; 
 an image capture unit obtaining an image, wherein the image has at least three impact points on a target; and 
 a processing unit calculating a center position according to the positions of the at least three impact points in the image, and setting a predefined view center of the display unit to the center position. 
 
     
     
       2. The sight of  claim 1 , wherein an image range obtained by the image capture unit is larger than a view range of the display unit, after the predefined view center is set to the center position of the at least three impact points, the display unit obtains an image portion corresponding to the view range from the image range according to the center position, thus to display the image portion in the display unit. 
     
     
       3. The sight of  claim 1 , wherein the at least three impact points are generated by shooting projectiles on the target by a firearms equipped with the sight according to the predefined view center, and the at least three impact points are within a predefined range. 
     
     
       4. The sight of  claim 1 , wherein the sight further comprises an optical module having no back-end upright optics group or an eyepiece, wherein the image capture unit obtained the image via the optical module. 
     
     
       5. A sight, comprising:
 a display unit; 
 a dip angle detector detecting an angle of dip of the sight to a plane; and 
 a processing unit calculating a predictive impact point according to the angle of dip and at least one calculation parameter, and displaying an impact point indication in the display unit accordingly to the predictive impact point, and when the angle of dip is changed, re-calculating the predictive impact point according to the new angle of dip and the at least one calculation parameter, and re-displaying the corresponding impact point indication in the display unit. 
 
     
     
       6. The sight of  claim 5 , wherein the at least one calculation factor comprises air resistance, a weight of a projectile, or a velocity of the projectile. 
     
     
       7. The sight of  claim 5 , wherein the predictive impact point is a distance between the sight and a target. 
     
     
       8. The sight of  claim 5 , wherein the processing unit further obtains a predictive distance between the sight and a target using a distance measurement method, and displays a specific prompt in the display unit according to the predictive distance. 
     
     
       9. The sight of  claim 8 , wherein the distance measurement method comprises a triangle distance measurement method, a laser distance measurement method, an IR distance measurement method, or an ultrasonic distance measurement method. 
     
     
       10. The sight of  claim 8 , wherein the specific prompt comprises a text display corresponding to the predictive distance, or a specific indication displayed at a specific position corresponding to the predictive distance in the display unit. 
     
     
       11. The sight of  claim 10 , wherein the processing unit further determines whether the impact point indication overlaps with the specific indication, when the impact point indication overlaps with the specific indication, generates a registration prompt. 
     
     
       12. The sight of  claim 11 , wherein the registration prompt comprises a voice, a text, a numeral, a symbol, or a change of color of the impact point indication or the specific indication. 
     
     
       13. The sight of  claim 5 , wherein the display unit comprises a head mounted display, a display panel, a view finder of the sight, or a micro-display having a magnification eyepiece. 
     
     
       14. The sight of  claim 5 , wherein the processing unit further performs a correction operation, wherein the correction operation comprises the steps of:
 obtaining an image by an image capture unit, wherein the image has an actual impact point on a target; 
 calculating a compensation angle according to a pixel interval between an impact point indication and the actual impact point in the image, a resolution of the image, and a vertical view angle of the sight; 
 calculating a compensated angle of dip according to the angle of dip and the compensation angle; 
 calculating an error factor of the at least one calculation parameter according to the compensated angle of dip, the predictive impact point, and the at least one calculation parameter; and 
 updating the at least one calculation parameter using the error factor. 
 
     
     
       15. The sight of  claim 14 , wherein the error factor comprises an initial velocity of a projectile. 
     
     
       16. A sight, comprising:
 a display unit; 
 a dip angle detector detecting an angle of dip of the sight to a plane; 
 an image capture unit obtaining an image, wherein the image comprises at least an actual impact point on a target, and a predictive impact point is calculated according to the angle of dip and at least one calculation parameter, wherein the impact point indication is displayed in the display unit according to the predictive impact point; and 
 a processing unit calculating a compensation angle according to a pixel interval between the impact point indication and the actual impact point in the image, a resolution of the image, and a vertical view angle of the sight, and calculating a compensated angle of dip according to the angle of dip and the compensation angle, calculating an error factor of the at least one calculation parameter according to the compensated angle of dip, the predictive impact point, and the at least one calculation parameter, and updating the at least one calculation parameter using the error factor. 
 
     
     
       17. The sight of  claim 16 , wherein the error factor comprises an initial velocity of a projectile. 
     
     
       18. The sight of  claim 16 , wherein the processing unit further obtains a predictive distance between the sight and a target using a distance measurement method, and displays a specific prompt in the display unit according to the predictive distance. 
     
     
       19. The sight of  claim 18 , wherein the specific prompt comprises a text display corresponding to the predictive distance, or a specific indication displayed at a specific position corresponding to the predictive distance in the display unit. 
     
     
       20. The sight of  claim 19 , wherein the processing unit further determines whether the impact point indication overlaps with the specific indication, when the impact point indication overlaps with the specific indication, generates a registration prompt.